|Ginkgo (Ginkgo biloba) "fruit" is a naked seed covered by sarcotesta (aka Cycad seed coat)|
|Image: Dogwood (Cornus) fruit (a drupe)|
|Image: London planetree (Platanus acerifolia) seed ball (a capsule)|
Within the succulent fruit category are three major sub-classes: simple, aggregate, and multiple. Berries (ex: blackcurrant, banana, date), drupes (ex: plum, cherry; walnuts, almonds), hesperidium (ex: orange), pepos (ex: watermelon), and pomes (ex: apple) are simple succulent fruit; raspberries, blackberries, and rose hips are examples of aggregate succulent fruit; and mulberry is an example of a multiple succulent fruit (Harrington; Thomas; botanical-online.com)
Harrington classifies the apple, rose hip, and fig as false fruits because these fruits are "supplemented with other structures". Stamens and petals grow "up and around the true fruit" of the apple (a pome), the rose hip (an achene), and the fig (contains a drupe).
What tree fruits are you seeing?